Herbicide composition for lawn

ABSTRACT

A herbicide composition for lawn characterized by containing iodosulfuron-methyl or its salt, and at least 1 kind of herbicidal compound selected from the group consisting of oxaziclomefone, fentrazamide, oxadiargyl, ethoxysulfuron, cafenstrole, indanofan, asulam, fenoxaprop, clethodim, ethofumesate, tribenuron-methyl, metsulfuron-methyl, thifensulfuron-methyl, bromoxynil, MCPA, 2,4-D, dicamba as effective components.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation application of U.S. patentapplication Ser. No. 12/226,428, filed Oct. 13, 2009, which claimspriority to PCT/EP2007/002883, filed Mar. 30, 2007, which claimspriority to Japanese Application No. 2006-116578 filed Apr. 20, 2006.Each of these applications are incorporated by reference in theirentirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a herbicide composition for lawn. Morespecifically the present invention relates to a herbicide compositionfor lawn consisting of a combination of at least 2 kinds of specifiedherbicidal compounds.

2. Description of Related Art

-   4-Iodo-2-[3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)ureidosulfonyl]benzoic    acid (common name: iodosulfuron-methyl),-   3-[1-(3,5-dichlorophenyl)-1-methylethyl]-3,4-dihydro-6-methyl-5-phenyl-2H-1,3-oxazin-4-one    (common name: oxaziclomefone),-   4-(2-chlorophenyl)-N-cyclohexyl-N-ethyl-4,5-dihydro-5-oxo-1H-terazol-1-carboxamide    (common name: fentrazamide),-   5-tert-butyl-3-(2,4-dichloro-5-propargyloxyphenyl)-1,3,4-oxadiazol-2(3H)-one    (common name: oxadiargyl),-   N,N-diethyl-3-meticylsulfonyl-1H-1,2,4-triazol-1-carboxamide (common    name: cafenstrole),-   1-(4,6-dimethoxypyrimidin-2-yl)-3-(2-ethoxyphenoxysulfonyl)urea    (common name: ethoxysulfuron),-   (RS)-2-[2-(3-chlorophenyl)-2,3-epoxypropyl]-2-ethylindan-1,3-dione    (common name: indanofan),-   methyl sulfanyl carbamate (common name: asulam)-   (±)-2-[4-(6-chloro-1,3-benzoxazol-2-yloxy)phenoxy]propionate; ethyl-   (±)-2-[4-(6-chlorobenzoxazol-2-yloxy)phenoxy]propionate (common    name: fenoxaprop),-   (±)-2-[(E)-1-[(E)-3-chloroallyloxyimino]propyl]-5-[2-(ethylthio)propyl]-=3-hydroxycycl    ohex-2-enone (common name: clethodim),-   (±)-2-ethoxy-2,3-dihydro-3,3-dimethylbenzofuran-5-yl    methanesulfonate (common name: ethofumesate),-   methyl    2-[4-methoxy-6-methyl-1,3,5-triazin-(2-yl(methyl)carbamoylsulfamoyl]-benzoate    (common name: tribenuron-methyl),-   methyl    2-(4-methoxy-6-methyl-1,3,5-triazin-2-ylcarbamoylsulfamoyl)benzoate    (common name: metsulfuron-methyl),-   methyl    3-(4-methoy-6-methyl-1,3,5-triazin-1-ylcarbamoylsulfamoyl)thiophen-=2-carboxylate    (common name: thifensulfuron-methyl),-   3,5-dibromo-4-hydroxybenzonitrile; 3,5-dibromo-4-hydroxyphenyl    cyanide (common name: bromoxynil),-   (4-chloro-2-methylphenoxy)acetic acid; 4-chloro-o-tolyloxyacetic    acid (common name: MCPA),-   (2,4-dichlorophenoxy)acetic acid (common name: 2,4-D) and-   3,6-dichloro-o-anisic acid (common name: dicamba), are known as    herbicide (cf. The Pesticide Manual, 14^(th) Edition, 2006,    published by British Crop Protection Council).

Also a herbicide composition containing, for example,iodosulfuron-methyl and other herbicides for controlling rice weeds isknown (cf. Japanese Laid-open Patent Publication No. 2002-520342).

Further, a mixed composition of at least 2 kinds of compounds selectedfrom many known herbicides such as iodosulfuron-methyl, oxadiargyl, etc.is also known (cf. Japanese Laid-open Patent Publication No.2005-502717).

SUMMARY OF THE INVENTION

In the lawn management for instance in a garden, golf course, publicgreen areas, roadsides, etc., control of lawn weeds is the mostimportant task for keeping views and good maintenance of golf course,etc. Up to now, however, there have been no satisfactory herbicides forlawn.

The present inventors found that the combination of the herbicidalcompounds mentioned below shows an excellent and desirable effect interms of weed controlling on the lawn and no or reduced phytotoxicity tothe lawn and completed the present invention.

Thus, the present invention provides a herbicide for lawn characterizedby combining

(a) iodosulfuron-methyl or its salt, and(b) at least 1 kind of herbicidal compound selected from the groupconsisting of oxaziclomefone, fentrazamide, oxadiargyl, ethoxysulfuron,cafenstrole, indanofan, asulam, fenoxaprop, clethodim, ethofumesate,tribenuron-methyl, metsulfuron-methyl, thifensulfuron-methyl,bromoxynil, MCPA, 2,4-D and dicamba. In the present invention, theparticularly preferable example of salt of iodosulfuron-methyl is thesodium salt.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT

The herbicides (a) and (b) are referred to either by the “common name”according to the International Organization for Standardization (ISO) orby the chemical name, if appropriate together with a customary codenumber and in each case include all application forms, such as acids,salts, esters and isomers, such as stereoisomers and optical isomers.

Preferred herbicides (b) are oxaziclomefone, fentrazamide, oxadiargyl,ethoxysulfuron, cafenstrole, indanofan and asulam.

The combined herbicide of the present invention, preferably, shows asubstantially higher herbicidal effect (synergistic effect) than the sumof the effect of each active compound by each single application,compared with the case that each active compound of the above-mentioned(a) and (b) is used each singly. As a result, in case of controllingweeds, it is possible to substantially reduce the concentration of eachsubstance used by now. At the same time, the combined herbicide of thepresent invention shows excellent controlling effect against a widerange of weeds on the lawn and gives no or reduced phytotoxicity to lawnspecies such as cynodon spp, pasapalum notatum, zoysia spp.,stenotaphrum americanum, axonopus spp., eremochloa optiuroides,pennisetum clandestinum, festuca rubra, festuca arundinacea, agrostisstolonifera, agrostis tenuis, poa pretense, lolium perenne.Consequently, the combined herbicide of the present invention can beapplied as an excellent, selective herbicide for the lawn.

In the combined herbicide of the present invention, the usage ratio of acomponent (a) and a component (b) is not strictly restricted but can bevaried in a relatively wide range according to the application time,application place, application method, etc. of said combined herbicide.Generally, a herbicidal compound as the component (b) can be used in therange of 0.001-1000 parts by weight, preferably 0.01-100 parts by weightto 1 part by weight of a component (a). More specifically, as for thepreferred components (b), there can be used the amounts, for example, inthe following ranges to 1 part by weight of iodosulfuron-methyl sodiumsalt as the component (a):

(b-1) oxaziclomefone: 2-15 parts by weight, preferably 5-10 parts byweight,(b-2) fentrazamide: 50-110 parts by weight, preferably 60-100 parts byweight,(b-3) oxadiargyl: 5-15 parts by weight, preferably 7-12 parts by weight,(b-4) ethoxysulfuron: 3-12 parts by weight, preferably 5-9 parts byweight,(b-5) cafenstrole: 70-150 parts by weight, preferably 90-130 parts byweight,(b-6) indanofan: 30-80 parts by weight, preferably 40-70 parts byweight,(b-7) asulam: 50-110 parts by weight, preferably 60-100 parts by weight.

The combined herbicide of the present invention can be used forcontrolling various kinds of weeds developing on the lawn.

As examples of the weeds to be controlled there can be mentioned thefollowing:

Monocotyledonous weeds such as: Digitaria ciliayis (Retz.) Koeler,Eleusine indica (L.) Gaertn., Setaria viridis (L.) Beauv. var. viridis,Poa annua L., Alopecurus aequalis Sobol. var. amurensis, Imperatacylindrica (L.) Beau., Luzula capitata (Mig.) Mig, Cyperus rotundus L.,Cyperus brevifolius (Rottb.) Hassk. var. leiolepis, Digitaria radicosa(Presl) Mig., Digitaria violascens Link), Setaria faberii Herrm, etc.Dicotyledonous weeds such as: Rumex japonicus Houtt., Portulaca oleraceaL. var. oleracea, Stellaria neglecta Weihe, Kummerowia striata (Thunb.ex Murray) Schindl., Euphorbia supina Rafin, Galinsoga ciliata (Rafin.)Blake, Cerastium glomeratum Thuill., Stellaria alsine Grimm. varundulata (Thunb. ex Murray) Ohwi, Cardamine flexuosa With., Capsellabursa-pastoris Medicus, Lamium amplexicaule L., Veronica persica Poir.,Aster maaekii Regel, Oxalis comiculata L., Hydrocotyle sibthorpioidesLam., Plantago asiatica L., Plantago lanceolata L., Artemisia indicaWilld. var. maximowiczii (Nakai) Hara, Erigeron philadelphicus L., Rumexacetosa L., Taraxacum officinale Weber, etc.

The use of the combined herbicide of the present invention, however,should not be restricted to these weeds in any way, but can be appliedagainst other weeds in the same manner.

The combined herbicide of the present invention can be made intocustomary formulation forms in case of using for control of lawn weeds.As such formulation forms there can be mentioned, for example,solutions, emulsions, wettable powders, suspensions, water dispersiblegranules, powders, soluble powders, granules, suspo-emulsionconcentrates, microcapsules in polymer substance, etc.

These formulations can be prepared by per se known methods. Theformulations according to the present invention can be prepared, forexample, by mixing the aforementioned components (a) and (b) withextenders, namely liquid diluents and/or solid diluents, and, in case ofnecessity, by using surfactants, namely emulsifiers and/or dispersants.

In case of using water as extender, for example, organic solvents can beused as auxiliary solvent. As liquid diluents there can be mentioned,for example, organic solvents such as aromatic hydrocarbons (forexample, xylene, toluene, alkylnaphthalene, etc.), chlorinated aromaticor chlorinated aliphatic hydrocarbons (for example, chlorobenzenes,ethylene chlorides, methylene chloride, etc.), aliphatic hydrocarbons[for example, cyclohexane etc. or paraffins (for example, mineral oilfractions, mineral oils, vegetable oils, etc.)], alcohols (for example,butanol, glycols and their ethers, esters, etc.), ketones (for, example,acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone,etc.), strongly polar solvents (for example, dimethylformamide, dimethylsulfoxide, etc.), and water.

As solid diluents there can be mentioned, for example, ground naturalminerals (for example, kaolin, clay, talc, chalk, quartz, attapulgite,montmorillonite, diatomaceous earth, etc.), ground synthetic minerals(for example, highly dispersed silicic acid, alumina, silicates, etc.)etc. As solid carriers for granules, for example, crushed andfractionated rocks (for example, calcite, marble, pumice, sepiolite,dolomite, etc.) synthetic granules of inorganic and organic meals,particles of organic materials (for example, saw dust, coconut shells,maize cobs, tobacco stalks, etc.) etc. can be used.

As surfactants there can be mentioned nonionic or anionic surfactants.As suitable nonionic surfactants there can be mentioned, for example,compounds obtained by addition polymerization of ethylene oxide tohigher alcohols such as lauryl alcohol, stearyl alcohol, oleyl alcohol,etc.; compounds obtained by addition polymerization of ethylene oxide toalkylphenols such as isooctylphenol, nonylphenol, etc.; compoundsobtained by addition polymerization of ethylene oxide to alkylnaphtholssuch as butylnaphthol, octylnaphthol, etc.; compounds obtained byaddition polymerization of ethylene oxide to higher fatty acids such aspalmitic acid, stearic acid, oleic acid, etc.; compounds obtained byaddition polymerization of ethylene oxide to amines such asdodecylamine, stearic acid amine, etc.; higher fatty acid esters ofpolyhydric alcohols such as sorbitan etc. and compounds obtained byaddition polymerization of ethylene oxide thereto; compounds obtained byblock addition polymerization of ethylene oxide and propylene oxide,etc. As suitable anionic surfactants there can be mentioned, forexample, alkyl sulfate salts such as sodium lauryl sulfate, amine saltof oleyl alcohol sulfuric acid ester, etc.; alkylsulfonic acid saltssuch as sodium dioctylsulfosuccinate, sodium 2-ethylhexenesulfonate,etc.; arylsulfonic acid salts such as sodiumisopropyl-naphthalenesulfonate, sodiummethylenebis-naphthalenesulfonate, sodium lignin-sulfonate, sodiumdodecylbenezenesulfonate, etc.

As dispersants, for example, lignin sulfite waste liquor or methylcellulose are suitable.

Tackifiers can also be used in formulations (powders, granules,emulsifiable concentrates). As said tackifiers there can be mentioned,for example, carboxymethyl cellulose, natural and synthetic polymers(for example, gum Arabic, polyvinyl alcohol, polyvinyl acetates, etc.)natural phospholipids (for example, cephalins or recithins), syntheticphospholipids, etc. Further, as additives, mineral oils or vegetableoils can be used.

Colorants can also be used. As said colorants there can be mentionedinorganic pigments (for example, iron oxide, titanium oxide, PrussianBlue, etc,), organic dyestuffs such as alizarin dyestuffs, azo dyestuffsor metal phthalocyanine dyestuffs, and further traces nutrients such assalts of metals such as iron, manganese, boron, copper, cobalt,molybdenum, zinc, etc.

The formulations can contain the total of the aforementioned components(a) and (b) constituting the herbicide of the present invention at aconcentration in the range of generally 0.1-95% by weight, preferably0.5-90% by weight.

The herbicide of the present invention can be used for controlling weedsas themselves or in their formulation forms. It is also possible to dotank mixing at the time of usage and further to use together with otherknown active compounds, for example, other herbicides, safeners,fungicides, insecticides, plant growth regulators, plant nutrients orsoil improving agents.

The herbicide of the present invention can be used as such or in theirformulation forms or in application forms prepared by further dilutingsaid formulations, for example, in the forms of ready-to-use solutions,emulsifiable concentrates, suspensions, powders, wettable powders,granules, etc. Formulations of these forms can be applied to lawngrowing area by usual methods, for example, watering, spraying,atomizing, dusting, granule spreading, etc.

The application amount of the herbicide of the present invention can bevaried in a substantial range according to, for example, the weeds to becontrolled, application time, soil conditions, formulation form, etc.The application amount can be in the range of, for example, 0.0005 kg-50kg/ha, preferably 0.001 kg-5 kg/ha as the total amount of the effectivecomponents of the components (a) and (b).

The herbicide of the present invention can be applied not only in theform of a mixed formulation containing the components (a) and (b) asmentioned above but also in the form of a single formulation of eachcomponent (a) and (b) simultaneously, continuously or successively.

The herbicide of the present invention shows, as shown in thebelow-mentioned test examples, a precise controlling effect againstvarious kinds of lawn weeds and shows an excellent residual effect.

Excellent effect of the herbicide of the present invention will bedescribed more specifically by the following examples. The presentinvention, however, should not be restricted only to them in any way. Inthe examples the component (a) and components (b-1)-(b-7) are defined asaforementioned.

EXAMPLES Formulation Examples Example 1 Flowable

Component (a) 1.7% by weight Component (b-1) 15.0% by weightPolyoxyethylene nonyl phenyl ether 2.0% by weight Sodiumdioctylsulfosuccinate 2.0% by weight Xanthan gum 0.2% by weight Water79.1% by weight

The above-mentioned components are wet crushed with a wet ball mill toobtain a flowable.

Example 2 Granule

Component (a) 1.7% by weight Component (b-1) 15.0% by weight Sodiumligninsulfonate 3.0% by weight Sodium alkylnaphthalenesulfonate 1.0% byweight Bentonite 30.0% by weight Talc 49.3% by weight

After the above-mentioned components have been mixed and crushed, themixture is granulated by a usual method with a granulator and dried toobtain granules.

Example 3 Wettable Powder

Component (a) 1.7% by weight Component (b-1) 15.0% by weight Sodiumligninsulfonate 3.0% by weight Sodium dialkyl naphthalenesulfonate 3.0%by weight Kaolin 77.3% by weight

The above-mentioned components are mixed, crushed and homogenized toobtain a wettable powder.

Example 4 Flowable

Component (a) 0.34% by weight Component (b-2) 30.0% by weightPolyoxyethylene nonyl phenyl ether 2.0% by weight Sodiumdioctylsulfosuccinate 2.0% by weight Xanthan gum 0.2% by weight Water65.46% by weight

The above-mentioned components are wet crushed with a wet ball mill toobtain a flowable.

Example 5 Granule

Component (a) 0.17% by weight Component (b-2) 15.0% by weight Sodiumligninsulfonate 3.0% by weight Sodium alkylnaphthalenesulfonate 1.0% byweight Bentonite 30.0% by weight Talc 50.83% by weight

After the above-mentioned components have been mixed and crushed, themixture is granulated by a usual method with a granulator and dried toobtain granules.

Example 6 Wettable Powder

Component (a) 0.34% by weight Component (b-2) 30.0% by weight Sodiumligninsulfonate 3.0% by weight Sodium dialkyl naphthalenesulfonate 3.0%by weight Kaolin 63.66% by weight

The above-mentioned components are mixed, crushed and homogenized toobtain a wettable powder.

Example 7 Flowable

Component (a) 1.7% by weight Component (b-3) 17.0% by weightPolyoxyethylene nonyl phenyl ether 2.0% by weight Sodiumdioctylsulfosuccinate 2.0% by weight Xanthan gum 0.2% by weight Water77.1% by weight

The above-mentioned components are wet crushed with a wet ball mill toobtain a flowable.

Example 8 Granule

Component (a) 1.7% by weight Component (b-3) 17.0% by weight Sodiumligninsulfonate 3.0% by weight Sodium alkylnaphthalenesulfonate 1.0% byweight Bentonite 30.0% by weight Talc 47.3% by weight

After the above-mentioned components have been mixed and crushed, themixture is granulated by a usual method with a granulator and dried toobtain granules.

Example 9 Wettable Powder

Component (a) 1.7% by weight Component (b-3) 17.0% by weight Sodiumligninsulfonate 3.0% by weight Sodium dialkyl naphthalenesulfonate 3.0%by weight Kaolin 75.3% by weight

The above-mentioned components are mixed, crushed and homogenized toobtain a wettable powder.

Example 10 Flowable

Component (a) 1.7% by weight Component (b-4) 12.5% by weightPolyoxyethylene nonyl phenyl ether 2.0% by weight Sodiumdioctylsulfosuccinate 2.0% by weight Xanthan gum 0.2% by weight Water81.6% by weight

The above-mentioned components are wet crushed with a wet ball mill toobtain a flowable.

Example 11 Granule

Component (a) 1.7% by weight Component (b-4) 12.5% by weight Sodiumligninsulfonate 3.0% by weight Sodium alkylnaphthalenesulfonate 1.0% byweight Bentonite 30.0% by weight Talc 51.8% by weight

After the above-mentioned components have been mixed and crushed, themixture is granulated by a usual method with a granulator and dried toobtain granules.

Example 12 Wettable Powder

Component (a) 1.7% by weight Component (b-4) 12.5% by weight Sodiumligninsulfonate 3.0% by weight Sodium dialkyl naphthalenesulfonate 3.0%by weight Kaolin 79.8% by weight

The above-mentioned components are mixed, crushed and homogenized toobtain a wettable powder.

Example 13 Flowable

Component (a) 0.34% by weight Component (b-5) 40.0% by weightPolyoxyethylene nonyl phenyl ether 2.0% by weight Sodiumdioctylsulfosuccinate 2.0% by weight Xanthan gum 0.2% by weight Water55.46% by weight

The above-mentioned components are wet crushed with a wet ball mill toobtain a flowable.

Example 14 Granule

Component (a) 0.17% by weight Component (b-5) 20.0% by weight Sodiumligninsulfonate 3.0% by weight Sodium alkylnaphthalenesulfonate 1.0% byweight Bentonite 30.0% by weight Talc 45.83% by weight

After the above-mentioned components have been mixed and crushed, themixture is granulated by a usual method with a granulator and dried toobtain granules.

Example 15 Wettable Powder

Component (a) 0.34% by weight Component (b-5) 40.0% by weight Sodiumligninsulfonate 3.0% by weight Sodium dialkyl naphthalenesulfonate 3.0%by weight Kaolin 53.66% by weight

The above-mentioned components are mixed, crushed and homogenized toobtain a wettable powder.

Example 16 Flowable

Component (a) 0.34% by weight Component (b-6) 20.0% by weightPolyoxyethylene nonyl phenyl ether 2.0% by weight Sodiumdioctylsulfosuccinate 2.0% by weight Xanthan gum 0.2% by weight Water75.46% by weight

The above-mentioned components are wet crushed with a wet ball mill toobtain a flowable.

Example 17 Granule

Component (a) 0.34% by weight Component (b-6) 20.0% by weight Sodiumligninsulfonate 3.0% by weight Sodium alkylnaphthalenesulfonate 1.0% byweight Bentonite 30.0% by weight Talc 45.66% by weight

After the above-mentioned components have been mixed and crushed, themixture is granulated by a usual method with a granulator and dried toobtain granules.

Example 18 Wettable Powder

Component (a) 0.34% by weight Component (b-6) 20.0% by weight Sodiumligninsulfonate 3.0% by weight Sodium dialkyl naphthalenesulfonate 3.0%by weight Kaolin 73.66% by weight

The above-mentioned components are mixed, crushed and homogenized toobtain a wettable powder.

Example 19 Flowable

Component (a) 0.34% by weight Component (b-7) 30.0% by weightPolyoxyethylene nonyl phenyl ether 2.0% by weight Sodiumdioctylsulfosuccinate 2.0% by weight Xanthan gum 0.2% by weight Water65.46% by weight

The above-mentioned components are wet crushed with a wet ball mill toobtain a flowable.

Example 20 Granule

Component (a) 0.34% by weight Component (b-7) 30.0% by weight Sodiumligninsulfonate 3.0% by weight Sodium alkylnaphthalenesulfonate 1.0% byweight Bentonite 30.0% by weight Talc 35.66% by weight

After the above-mentioned components have been mixed and crushed, themixture is granulated by a usual method with a granulator and dried toobtain granules.

Example 21 Wettable Powder

Component (a) 0.34% by weight Component (b-7) 30.0% by weight Sodiumligninsulfonate 3.0% by weight Sodium dialkyl naphthalenesulfonate 3.0%by weight Kaolin 63.66% by weight

The above-mentioned components are mixed, crushed and homogenized toobtain a wettable powder.

Biological Examples Test Example 1 The Agent Amount Reduction Effect andHerbicidal Effect Enhancing Action of the Soil Treatment by Mixing

On a field of Zoysia japonica sectioned to 100 cm×100 cm, seeds ofDigitaria ciliayis (Retz.) Koeler, Poa annua L., Polygonum hydropiperL., Euphorbia supine Rafin, Oxalis comiculata L., Cyperus microiria weresown and covered with 0.5 cm soil. Seven days after weeds sowing,treatment was conducted with watering amount of 200 cc/m². Theprescribed amount of test compound was sprayed with a small spray in theform of the formulation prepared according to the above-mentionedexamples or a wettable powder of a single compound diluted with water.

The herbicidal effect and the degree of phytotoxicity to the lawn werestudied 45 days after the agent treatment. The results are shown inTable 1-Table 7.

Evaluation Standard:

Herbicidal effect: 100%: complete death 0%: no effectPhytotoxicity: 100%: complete death 0%: no phytotoxicity

In the tables, ai means the effective component.

TABLE 1 Effective component amount g ai/ha Herbicidal effectIodosulfuron Digitaria methyl ciliayis Oxalis Zoysia sodium (Retz.) PoaPolygonum Erigeron corniculata Chenopodium matrella Test agent saltOxaziclomefone Koeler annua L. blumei canadensis L. ficifoliumphytotoxicity Iodosulfuron 17 — 60 60 100 75 70 80 0 methyl sodium saltOxaziclomefone — 150 90 90 0 0 0 0 0 Herbicide of the 8.5 75 95 100 100100 100 100 0 present 17 150 100 100 100 100 100 100 0 invention 25.5225 100 100 100 100 100 100 0 No treatment — — 0 0 0 0 0 0 0

TABLE 2 Effective component amount g ai/ha Herbicidal effectIodosulfuron Digitaria methyl ciliayis Zoysia sodium (Retz.) PoaPolygonum Erigeron Oxalis Chenopodium matrella Test agent saltFentrazamide Koeler annua L. blumei canadensis corniculata L. ficifoliumphytotoxicity Iodosulfuron 17 — 60 60 100 75 70 80 0 methyl sodium saltFentrazamide — 1500 90 80 0 0 0 20 0 Herbicide of the 8.5 750 95 100 100100 100 100 0 present 17 1500 100 100 100 100 100 100 0 invention 25.52250 100 100 100 100 100 100 0 No treatment — — 0 0 0 0 0 0 0

TABLE 3 Effective component amount Herbicidal effect g ai/ha DigitariaIodosulfuron ciliayis Zoysia methyl sodium (Retz.) Poa PolygonumErigeron Oxalis Chenopodium matrella Test agent salt Oxadiargyl Koelerannua L. blumei canadensis corniculata L. ficifolium phytotoxicityIodosulfuron 17 — 60 60 100 75 70 80 0 methyl sodium salt Oxadiargyl —170 70 70 40 20 20 50 0 Herbicide of the 8.5 85 98 100 100 100 100 100 0present 17 170 100 100 100 100 100 100 0 invention 25.5 225 100 100 100100 100 100 0 No treatment — — 0 0 0 0 0 0 0

TABLE 4 Effective component amount Herbicidal effect g ai/ha DigitariaIodosulfuron ciliayis Oxalis Zoysia methyl sodium (Retz.) Poa PolygonumErigeron corniculata Chenopodium matrella Test agent salt EthoxysulfuronKoeler annua L. blumei canadensis L. ficifolium phytotoxicityIodosulfuron 17 — 60 60 100 75 70 80 0 methyl sodium salt Ethoxysulfuron— 125 0 0 60 75 50 70 0 Herbicide of the 8.5 62.5 100 100 100 100 100100 0 present 17 120 100 100 100 100 100 100 0 invention 25.5 182.5 100100 100 100 100 100 0 No treatment — — 0 0 0 0 0 0 0

TABLE 5 Effective component amount Herbicidal effect g ai/ha DigitariaIodosulfuron ciliayis Zoysia methyl sodium (Retz.) Poa PolygonumErigeron Oxalis Chenopodium matrella Test agent salt Cafenstrole Koelerannua L. blumei canadensis corniculata L. ficifolium phytotoxicityIodosulfuron 17 — 60 60 100 75 70 80 0 methyl sodium salt Cafenstrole —2000 0 0 60 75 50 70 0 Herbicide of the 8.5 1000 80 80 100 100 100 100 0present 17 2000 100 95 100 100 100 100 0 invention 25.5 3000 100 100 100100 100 100 0 No treatment — — 0 0 0 0 0 0 0

TABLE 6 Effective component Herbicidal effect amount g ai/ha DigitariaIodosulfuron ciliayis methyl sodium (Retz.) Poa Polygonum ErigeronOxalis Chenopodium Zoysia matrella Test agent salt Indanofan Koelerannua L. blumei canadensis corniculata L. ficifolium phytotoxicityIodosulfuron 17 — 60 60 100 75 70 80 0 methyl sodium salt Indanofan —1000 0 0 60 75 50 70 0 Herbicide of the 8.5 500 80 80 100 100 100 100 0present 17 1000 90 90 100 100 100 100 0 invention 25.5 1500 100 100 100100 100 100 0 No treatment — — 0 0 0 0 0 0 0

TABLE 7 Effective component Herbicidal effect amount g ai/ha DigitariaIodosulfuron ciliayis Poa Oxalis Zoysia methyl (Retz.) annua PolygonumErigeron corniculata Chenopodium matrella Test agent sodium salt AsulamKoeler L. blumei canadensis L. ficifolium phytotoxicity Iodosulfuron 17— 40 50 80 75 50 70 0 methyl sodium salt Asulam — 1500 20 20 0 0 0 0 0Herbicide of the 8.5 750 100 100 100 100 100 100 0 present 17 1500 95100 100 100 100 100 0 invention 25.5 2250 100 100 100 100 100 100 0 Notreatment — ( 0 0 0 0 0 0 0

Test Example 2 The Agent Amount Reduction Effect and Herbicidal EffectEnhancing Action of the Foliage and Soil Treatment by Mixing

A test section of Zoysia matrella had been prepared in the same methodas in the Test Example 1 and on the 28th day after weeds sowing atreatment was conducted with watering amount of 200 cc/m2. Theprescribed amount of test compound was sprayed with a small spray in theform of the formulation prepared according to the aforementionedexamples or a wettable powder of a single compound diluted with water.

The herbicidal effect and the degree of phytotoxicity to the lawn werestudied 45 days after the agent treatment in the same manner as TestExample 1. The results are shown in Table 8-Table 14.

TABLE 8 Effective component amount Herbicidal effect g ai/ha DigitariaIodosulfuron ciliayis Poa Zoysia methyl (Retz.) annua Polygonum ErigeronOxalis Chenopodium matrella Test agent sodium salt Oxaziclomefone KoelerL. blumei canadensis corniculata L. ficifolium phytotoxicityIodosulfuron 17 — 40 50 80 75 50 70 0 methyl sodium salt Oxaziclomefone— 150 30 30 0 0 0 0 0 Herbicide of the 8.5 75 90 95 100 90 90 100 0present 17 150 95 100 100 100 100 100 0 invention 25.5 225 100 100 100100 100 100 0 No treatment — — 0 0 0 0 0 0 0

TABLE 9 Effective component amount Herbicidal effect g ai/ha DigitariaIodosulfuron ciliayis Oxalis Zoysia methyl sodium (Retz.) Poa PolygonumErigeron corniculata Chenopodium matrella Test agent salt FentrazamideKoeler annua L. blumei canadensis L. ficifolium phytotoxicityIodosulfuron 17 — 40 50 80 75 50 70 0 methyl sodium salt Fentrazamide —1500 40 30 0 0 0 0 0 Herbicide of the 8.5 750 90 90 100 90 90 100 0present 17 1500 95 100 100 100 100 100 0 invention 25.5 2250 100 100 100100 100 100 0 No treatment — — 0 0 0 0 0 0 0

TABLE 10 Effective component Herbicidal effect amount ai/ha DigitariaIodosulfuron ciliayis Zoysia methyl sodium (Retz.) Poa PolygonumErigeron Oxalis Chenopodium matrella Test agent salt Oxadiargyl Koelerannua L. blumei canadensis corniculata L. ficifolium phytotoxicityIodosulfuron 17 — 40 50 80 75 50 70 0 methyl sodium salt Oxadiargyl —170 40 30 20 20 0 30 0 Herbicide of the 8.5 85 90 90 90 90 90 100 0present 17 170 100 95 100 100 100 100 0 invention 25.5 225 100 100 100100 100 100 0 No treatment — — 0 0 0 0 0 0 0

TABLE 11 Effective component amount Herbicidal effect g ai/ha DigitariaIodosulfuron ciliayis Oxalis Zoysia methyl sodium (Retz.) Poa PolygonumErigeron corniculata Chenopodium matrella Test agent salt EthoxysulfuronKoeler annua L. blumei canadensis L. ficifolium phytotoxicityIodosulfuron 17 — 40 50 80 75 50 70 0 methyl sodium salt Ethoxysulfuron— 125 0 0 40 60 30 50 0 Herbicide of the 8.5 62.5 90 90 95 100 100 100 0present 17 120 100 95 100 100 100 100 0 invention 25.5 182.5 100 100 100100 100 100 0 No treatment — — 0 0 0 0 0 0 0

TABLE 12 Effective component amount Herbicidal effect g ai/ha DigitariaIodosulfuron ciliayis Zoysia methyl sodium (Retz.) Poa PolygonumErigeron Oxalis Chenopodium matrella Test agent salt Cafenstrole Koelerannua L. blumei canadensis corniculata L. ficifolium phytotoxicityIodosulfuron 17 — 40 50 80 75 50 70 0 methyl sodium salt Cafenstrole —2000 40 30 0 0 0 20 0 Herbicide of the 8.5 1000 80 80 90 90 90 90 0present 17 2000 100 95 100 100 100 100 0 invention 25.5 3000 100 100 100100 100 100 0 No treatment — — 0 0 0 0 0 0 0

TABLE 13 Effective component amount g ai/ha Herbicidal effectIodosulfuron Digitaria Zoysia methyl ciliayis Poa Polygonum ErigeronOxalis Chenopodium matrella Test agent sodium salt Indanofan (Retz.)Koeler annua L. blumei canadensis corniculata L. ficifoliumphytotoxicity Iodosulfuron 17 — 40 50 80 75 50 70 0 methyl sodium saltIndanofan — 1000 30 30 0 0 0 20 0 Herbicide of the 8.5 500 80 80 90 8090 90 0 present 17 1000 90 90 100 100 100 100 0 invention 25.5 1500 100100 100 100 100 100 0 No treatment — — 0 0 0 0 0 0 0

TABLE 14 Effective component Herbicidal effect amount g ai/ha DigitariaIodosulfuron ciliayis Poa Oxalis Zoysia methyl (Retz.) annua PolygonumErigeron corniculata Chenopodium matrella Test agent sodium salt AsulamKoeler L. blumei canadensis L. ficifolium phytotoxicity Iodosulfuron 17— 40 50 80 75 50 70 0 methyl sodium salt Asulam — 1500 40 30 70 60 60 600 Herbicide of the 8.5 750 100 100 100 100 100 100 0 present 17 1500 100100 100 100 100 0 invention 25.5 2250 100 100 100 100 100 100 0 Notreatment — — 0 0 0 0 0 0 0

1. A method for controlling a weed comprising applying (a)iodosulfuron-methyl or a salt thereof, and (b) fenoxaprop.
 2. The methodof claim 1, wherein said iodosulfuron-methyl or a salt thereof isiodosulfuron-methyl sodium salt.
 3. The method of claim 1, whereincomponents (a) and (b) are applied in a range from 0.001 kg-5 kg/ha asthe total amount of said components of (a) and (b).
 4. The method ofclaim 1, wherein components (a) and (b) are applied in a mixedformulation comprising said components of (a) and (b).
 5. The method ofclaim 1, wherein components (a) and (b) are applied in a singleformulation of each component (a) and (b).
 6. The method of claim 1,wherein components (a) and (b) are applied simultaneously.
 7. The methodof claim 1, wherein components (a) and (b) are applied continuously. 8.The method of claim 1, wherein components (a) and (b) are appliedsuccessively.
 9. The method of claim 1, wherein components (a) and (b)are applied to lawn.
 10. The method of claim 1, wherein said weed isselected from the group consisting of Digitaria ciliayis Koeler,Eleusine indica Gaertn., Setaria viridis Beauv. var. viridis, Poa annuaL., Alopecurus aequalis Sobol. var amurensis, Imperata cylindrica Beau.,Luzula capitata Mig, Cyperus rotundus L., Cyperus brevifolius Hassk.var. leiolepis, Digitaria radicosa Mig., Digitaria violascens, Setariafaberii Herrm, Rumex japonicus Houtt., Portulaca oleracea L. var.oleracea, Stellaria neglecta Weihe, Kummerowia striata Schindl.,Euphorbia supina Rafin, Galinsoga ciliata Blake, Cerastium glomeratumThuill., Stellaria alsine Grimm. var. undulata Ohwi, Cardamine flexuosaWith., Capsella bursa-pastoris Medicus, Lamium amplexicaule L., Veronicapersica Poir., Aster maaekii Regel, Oxalis corniculata L., Hydrocotylesibthorpioides Lam., Plantago asiatica L., Plantago lanceolata L.,Artemisia indica Willd. var. maximowiczii Hara, Erigeron philadelphicusL., Rumex acetosa L., and Taraxacum officinale Weber.
 11. The method ofclaim 1, wherein components (a) and (b) exhibit a synergistic effect.12. The method of claim 1, wherein components (a) and (b) are present ina ratio of 1:0.01-100 part by weight of components (a) to (b).
 13. Acomposition for controlling weeds comprising (a) iodosulfuron-methyl ora salt thereof, and (b) fenoxaprop.
 14. The composition of claim 13,wherein said iodosulfuron-methyl or a salt thereof isiodosulfuron-methyl sodium salt.
 15. The composition of claim 13,wherein components (a) and (b) exhibit a synergistic effect.
 16. Thecomposition of claim 13, wherein components (a) and (b) are present in aratio of 1:0.01-100 part by weight of components (a) to (b).
 17. Thecomposition of claim 13, further comprising an extender.
 18. Thecomposition of claim 17, wherein said extender is a diluent, surfactant,emulsifier, and/or dispersant.
 19. A method of preparing a compositionfor controlling weeds comprising mixing (a) iodosulfuron-methyl or asalt thereof, (b) fenoxaprop; and (c) an extender.
 20. The method ofpreparing a composition of claim 19, wherein said composition is in theform of a ready-to-use solution, emulsifiable concentrate, suspension,powders, wettable powder, or granules.